Twin socket



l Patented Sept. 13, 192?. I

UNITED STATES HENRY T. PAISTE, OF PHILADELPHIA, PENNSYLITANIA, ASSIGNOR '10 H. T. PAISTE 1,642,626 PATENT OFFICE.

COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

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One object of my invention is toprovide a relatively simple, inexpensive form of multiple lampv socket whichshall be convenient to wire and assemble, as well as safe and substantial, and the invention further contem-- plates a twin or double socket having an insulating body of novel form and construction especially designed to effectually conceal and protect the wires leading to its ter- .10 minals.

Another object of my invention is to proviile a simple and convenient form of double or twin socket including easily accessible means for separably connecting the parts constituting its body, and the invention more especially includes a body made of two interchangeable parts having the same form and construction, so designed and connected as to provide a sturdy, compact and ornamental form of lam fixture.

I also desire to provide a novel form of twin lamp socket or'fixture having two sets of independent conductors leading to the terminals of its two receptacles, the arrangement being such that these conductors are normally concealed while bein quickly and conveniently accessible when t e parts ,constituting the body of the socketare disas- ;sembled.

These objects and other advantageous ends I attain as hereinafter set forth, referenee bein had ,to the accompanying drawings, 1n

whEi i,

g.- 1 is a perspective view of a twin socket constructed in accordance with my invention;

Fig. 2 is an elevation of one end of the socket shown in Fig. 1; r

Fig. 3 is a vertical section on the line 33, Fig. 2; and

Fi 4 isan elevation 'of the normally conceale face of one of the parts constituting the body of my socket.

In the above drawings, 1 represents a supporting metallic or other plate or structure to which in the case illustrated, the lamp socket constituting my inventionis attached. This socket consists of a body made of two parts 2- 2, of insulating material such as porcelain, identical in structure and outline. Eachof these body parts consists of a foot or base portion 3, a substantially cylindrical head portion 4', and a neck portion 5 connecting the head and base portions.

1922. Serial No. 568,953.

Saidtwo portions are rigidly and firmly connected together, with their head portions 4-4 in axial alignment and their plane back faces in contact, by a single bolt 6 extending through their neck portions and having its head and nut countersunk there- 1n ;the recess forsaid nut preferably being of other than circular. section so as to prevent rotation of said nut. The base portion 3 of each part 2 is extended laterally beyond the neck 5 and its projecting portion is slotted for the reception of a screw orbolt 7 whereby it is clamped or immovably held to the supporting structure 1. This slot 8is intersected by a transversely extending cavity 9, preferably of rectangular section, for the reception of the nut of this bolt, which is held by the walls of said cavity from turning when the screw is rotated.

Each of the head portions 4 is formed to constitute a receptacle for a lamp having -mounted within it the well' known Edison socket terminals comprising a threaded metal shell 10 and a central spring tongue or other terminal 11, the arrangement being such that the two shells, and therefore the receptacles, are oppositely placed and in'axial alignment.

The flat adjacent backs of the two body parts are each longitudinally recessed for the reception of conductors 12 and 13, which have sweated or otherwise electrically connected to their extremities terminals 14 and 15 en aged and held in place by screws 16 and 1?, respectively in electrical connection with the central terminal 11 and the threads ed shell 10. The groves for each pairof conductors 12 and 13 are ofsuch depth that the latter lie below the plane of the. flat rear faces of their body parts and as said conductors are suitably insulated, there is no possibility of them engagingeach other or any of the metallic parts of the socket structure.

In order to facilitate the proper positioning of the two body parts, each of them is provided with a, pair of projecting dowel pins 20 diagonallyarranged so as to be 021-- pable of entering a pair of diagonally positioned recesses 21 in the other body member, there thus .being a pair of dowels and a pair of recesses for each of said body portions. After the conductors 12 and 13 have been equipped with suitable terminals and connected to the terminal screws of the two body portions, the latter may be brought to gether with their plane backs in contact, so that when the dowels enter their respective recesses, their cylindrical head portions will be in line and they may be rigidly connected by the bolt 6. Thereafter the supporting plate 1 may be connected to them by inserting suitable nuts in the cavities 9 and setting up the screws 7 after these have been entered in the slots 8.

The two body parts are thus rigidly connected to each other and to the supporting structure and while they together constitute a twin socket for the reception of two lamps or for one or more attachment plugs or other electrical devices, they areeach supplied by their own pair of electrical conductors. The

body parts of each socket are identical inv construction and equipment, may be readily interchanged so that any two out of a number may be placed together back to back and eaaeao connected as illustrated to constitute a single twin socket.

I claim:

1. The combination in a twin socket of two similar members each including a head portion havin a receptacle, a'reduced neck and an exten ed base portion; with means extending through the neck portions for separably connecting the members with the receptacles arranged to project in opposite directions.

2. The combination in a twin socket of two members each including a head portion having a cavity, a neck and a base pottion; terminals in the cavity of each head portion; a bolt extending through theneck ortions and holding the members togetli and electrically independent conductors connected to the terminals of the head ortions and extending laterally therefrom tween the neck and base portions.

HENRY T. PAISTE: 

